E9 error appears during pressure cooking; cooker may stop and release steam.

Safety first: Allow the cooker to cool and fully depressurize before opening the lid.

• Inspect lid gasket: Remove the large silicone sealing ring from the lid. Check for cracks, flattening, or food deposits in the groove. Clean thoroughly and reinstall, ensuring it sits evenly all around.
• Check float valve seal: Remove the float valve and its small silicone cap. Clean and inspect for wear. Replace if hardened or deformed.
• Check lid lock: Close the lid and ensure it clicks firmly into the locked position. The handle should fully engage.
• Water test: Run a short pressure program with only water. Watch for continuous steam escaping around the lid. If so, the gasket or lid assembly is not sealing properly.

If a new gasket and clean valves do not resolve E9, the lid assembly may be warped and require replacement.